Unhappy [Q] Problem with Wolder mitab Iron

Hi, I've a problem with a tablet Wolder mitab Iron. I know that this tablet is unknow for much people. Well, my uncle try to move app to external SD card and he unmount the "hard disk" of the tablet. He gave me the tablet to repair it and I run the recovery mode for do a hard reset but it doesn't do nothing, Android not run. Then I install the firmware of Wolder mitab New Age but when Android stars the touch screen doesn't work. He gave me other mitab Iron and I installed CWM and I brick the tablet, it doesn't run Android or Recovery mode. Can someone tell me one soluciton for this? Is there a ROM for this tablet for repair the first table? Is there one solution to repair the second table?
The tablet has the follow specifications:
-Andoid 4.2 (Jelly Bean)
-CPU Cortex A9 Dual Core 1GHz
-Chipset Allwinner 20
-Graphics Mali 400 Dual Core
-4 GB of internal memory

PD: I'm not sure where I post this, I think it's the best site. Sorry if you don't understand me, my English isn't the best.